GitHub SSH suddenly disappeared, what happened?
On August 12, 2021, many GitHub users encountered an issue when using SSH access. They found that no matter how hard they tried, they were unable to connect to their repositories via SSH. This confused and upset users, who took to social media to ask why. After some investigation, GitHub finally confirmed that the issue was due to a glitch in the GitHub system.
SSH (Secure Shell) is an encryption protocol that allows users to securely connect to remote computers over a network. SSH is more secure than other network connections because users can use key authentication to access remote computers, eliminating the need to enter a password. SSH is a very common way for GitHub users to access repositories. So when SSH suddenly disappeared, it was a huge blow to many users.
In fact, this is not the first time this has happened. Back in January 2020, GitHub experienced a similar outage, when many users reported being unable to access repositories using SSH. At the time, GitHub officially released a statement saying it was due to an unrelated system issue and that it was successfully fixed a few hours later. However, this time the outage lasted longer, lasting about a day, causing many users' work to be seriously affected.
After the problem occurred, GitHub published a blog post detailing the cause of the failure. It is reported that the failure was caused by GitHub's server used to handle SSH connections storing a large number of unnecessary SSH host keys. These keys are cached from past SSH connections, but when a certain number of keys are cached, it can cause performance issues on the server. Eventually, the accumulation of these keys caused the server to crash and become unable to provide SSH access.
In a blog post, GitHub said they are taking steps to prevent similar issues from happening again. These include strengthening the cache cleaning mechanism, implementing more intelligent caching strategies, and providing more detailed monitoring and alarm systems, etc. In addition, GitHub also urges users to use HTTPS for access when possible, as this can avoid the impact caused by SSH failure.
In short, although this SSH failure has brought trouble to many users, it also reminds us that we must keep monitoring and maintaining the system at all times. For technology companies such as GitHub, helping users solve technical problems and ensuring system stability and reliability are important issues they must face and solve every day.
The above is the detailed content of GitHub SSH suddenly disappeared, what happened?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

This article provides a guide to Git management, covering GUI tools (Sourcetree, GitKraken, etc.), essential commands (git init, git clone, git add, git commit, etc.), branch management best practices (feature branches, pull requests), and merge con

This guide explains how to push a single Git commit to a remote branch. It details using a temporary branch to isolate the commit, pushing this branch to the remote, and then optionally deleting the temporary branch. This method avoids conflicts and

This article addresses common Git commit failures. It details troubleshooting steps for issues like untracked files, unstaged changes, merge conflicts, and pre-commit hooks. Solutions and preventative measures are provided to ensure smoother Git wo

This article details methods for viewing Git commit content. It focuses on using git show to display commit messages, author info, and changes (diffs), git log -p for multiple commits' diffs, and cautions against directly checking out commits. Alt

This article explains the difference between Git's commit and push commands. git commit saves changes locally, while git push uploads these committed changes to a remote repository. The article highlights the importance of understanding this distin

This article explains the distinct roles of git add and git commit in Git. git add stages changes, preparing them for inclusion in the next commit, while git commit saves the staged changes to the repository's history. This two-step process enables

This article introduces Git, a distributed version control system. It highlights Git's advantages over centralized systems, such as offline capabilities and efficient branching/merging for enhanced collaboration. The article also details learning r

This beginner's guide introduces Git, a version control system. It covers basic commands (init, add, commit, status, log, branch, checkout, merge, push, pull) and resolving merge conflicts. Best practices for efficient Git use, including clear comm
